In the United States v. Union Pacific Railroad Company case of 1912, the Supreme Court dealt with a dispute over land rights. The U.S. government argued that certain lands granted to Union Pacific by Congress were intended for railroad purposes only and not for mineral extraction or other uses. The court ruled in favor of the U.S., stating that while Congress had indeed given Union Pacific large tracts of land, it was under specific conditions outlined in their charter which limited its use to railway construction and operation alone. Therefore, any minerals found on these lands belonged to the federal government rather than the company because they fell outside this scope of usage defined by law.

In the dissenting opinion for United States v. Union Pacific Railroad Company, it was argued that the majority's decision to allow the government to reclaim lands granted to Union Pacific under an 1862 Act of Congress was incorrect. The dissenting justices believed that this ruling ignored established legal principles and precedent regarding land grants, which typically included a reversionary interest in favor of the grantor only if explicitly stated in the granting document or statute. They pointed out that no such provision existed in this case; therefore, they contended there should be no implied condition allowing for reclamation by default. Moreover, they asserted that even if such a condition could be inferred from other parts of law or policy considerations surrounding railroad development at the time, it would not apply here because those conditions were fulfilled when Union Pacific completed its railway line within prescribed deadlines and maintained operations since then as required by law.